Stationary Lunges - Stability Ball

Start with your right foot about 2-3 feet in front of your left and both legs straight. Place your left hand on the ball which is on the floor next to you. Put your right hand on your hip or straight out to the side from your shoulder.

Execution

Bend both legs keeping your body upright as you roll the ball straight out to the left, then bring it back in with your hand as you straighten your legs. For extra challenge, hold a dumbbell in your free hand to fatigue your legs more quickly.